Preparation and the Water Removal of Biodiesel From Sludge Palm Oil

• Main Authors: Shih-Jung Fang, 方士榮
• Other Authors: Ming-Syong Cai
• Format: Others
• Language: zh-TW
• Published: 2009
• Online Access: http://ndltd.ncl.edu.tw/handle/34270720745465502203

碩士 === 南台科技大學 === 奈米科技研究所 === 97 === In this study, the parameters to prepare the biodiesel from sludge palm oil(SPO) was studied. The SPO different from the natural palm oil (Crude Palm Oil, CPO) has the characteristics of：(1) Low price the premium is only half of the CPO；(2) mud-like at 25℃,the solid content was about 50%；(3) High fatty acid content (about 50 wt.%). SPO has high fatty acids,therefor it has to carry out the acid catalyzed esterification to convert of the fatty acids in SPO to biodiesel first, and then used the alkaline catalyzed to further transesterification the SPO.The relationship of palm oil acid valued and the content of fatty acid was calculated 0.498 in this study.；After acid catalyzed esterification with methanol, the fatty acids in SPO was completely converted to fatty acid methyl ester.The water washed method was not suitable for the reducing of the acid value；According to the experimental results,the increase of NaOH(wt%) was induced to the high content of methyl ester(i.e. the conversion was high). However, the saponification of the free fatty acid was occurred as the amount of NaOH larger than 1.2 wt.% was added which leaded to the separation of two phase more difficult. The yield of methyl ester was also directly proportional to the amounts of methanol. However, as the methanol more than 40%, the yield of methyl ester was decrease.The properties of the product can compete with these of the advanced diesel. Another part of this study was the water removal of the biodiesel by the nanoabsorbent materials of water. Three different kinds of the materials were chose to absorb the water in biodiesel: Silica gel, CaO and MgO. The best nanoabsorber is Silica-gel, then CaO, MgO；The silica gel can recycle, it is more cost effective than the tradition method which used the vacuum distillation method to removal the remain water in biodiesel.